Following two ways
to create the database instance specific to WebSphere Portal

You can create the
database instance for websphere portal in following ways

By executing the IBM provided
DB2 commands directly

Using
"ConfigEngine" task

Using
the DB2 Commands

NOTE: Cluster Guide explains how to
create the separate DB instance for the each schema (Release, jcr, feedback,
customization, likeminds and community) but as I'm not using it for heavy use I
have created all schemas in single database instance (WP7DB)

Required commands
are specified in the Appendix section of the Cluster Guide page@64, included
same here for convenience.

From the command
prompt

Type
"db2cmd" brings up the DB2 command line processing (DB2CLP) and then
type db2